public async Task SaveSessionAsync()
{
if (!IsBackupEnabled)
{
LoggingService.LogInfo("Session backup is disabled.");
return;
}
// Serialize saves
await _semaphoreSlim.WaitAsync();
StorageFolder backupFolder = await SessionUtility.GetBackupFolderAsync();
LoggingService.LogInfo("Session backup is starting. Backup folder: " + backupFolder.Path);
Stopwatch stopwatch = Stopwatch.StartNew();
TextEditor[] textEditors = _notepadsCore.GetAllTextEditors();
TextEditor selectedTextEditor = _notepadsCore.GetSelectedTextEditor();
FileSystemUtility.ClearFutureAccessList();
NotepadsSessionDataV1 sessionData = new NotepadsSessionDataV1();
foreach (TextEditor textEditor in textEditors)
{
if (textEditor.EditingFile != null)
{
// Add the opened file to FutureAccessList so we can access it next launch
FileSystemUtility.TryAddToFutureAccessList(ToToken(textEditor.Id), textEditor.EditingFile);
}
if (!_sessionData.TryGetValue(textEditor.Id, out TextEditorSessionData textEditorData))
{
textEditorData = new TextEditorSessionData {
Id = textEditor.Id
};
if (textEditor.EditingFile != null)
{
// Persist the last save known to the app, which might not be up-to-date (if the file was modified outside the app)
BackupMetadata lastSaved = await SaveLastSavedChangesAsync(textEditor);
if (lastSaved == null)
{
continue;
}
textEditorData.LastSaved = lastSaved;
}
if (textEditor.IsModified)
{
// Persist pending changes relative to the last save
BackupMetadata pending = await SavePendingChangesAsync(textEditor);
if (pending == null)
{
continue;
}
textEditorData.Pending = pending;
}
// We will not create new backup files for this text editor unless it has changes
_sessionData.TryAdd(textEditor.Id, textEditorData);
}
if (textEditorData.LastSaved != null || textEditorData.Pending != null)
{
sessionData.TextEditors.Add(textEditorData);
if (textEditor == selectedTextEditor)
{
sessionData.SelectedTextEditor = textEditor.Id;
}
}
}
try
{
string sessionJson = JsonConvert.SerializeObject(sessionData, _encodingConverter);
ApplicationData.Current.LocalSettings.Values[SessionDataKey] = sessionJson;
}
catch
{
return; // Failed to save the session - do not proceed to delete backup files
}
await DeleteOrphanedBackupFilesAsync(sessionData);
stopwatch.Stop();
LoggingService.LogInfo("Successfully saved the current session. Total time: " + stopwatch.Elapsed.TotalMilliseconds + " milliseconds.");
_semaphoreSlim.Release();
}
